MPP-1.5-3 Micro Self-Clinching Pin for Positioning

The MPP-1.5-3 micro self-clinching pin is a catalog-defined positioning fastener for thin-sheet assemblies. Its 1.5 mm pin diameter, 3 mm length code, compact flush-mounting head and nominal 64-degree lead-in end support repeatable positioning and alignment where space is limited. The pin is installed by pressing the head into a correctly prepared mounting hole, producing a permanent mechanical attachment without loose hardware on the opposite side of the sheet.

Key Features

• Exact standard part number MPP-1.5-3 for unambiguous ordering.

• 1.5 mm positioning-pin diameter with a catalog tolerance of +/-0.038 mm.

• 3 mm pin length / length code for compact assemblies.

• Self-clinching press installation in sheet as thin as 0.5 mm (.020 in).

• Nominal 64-degree pin-end angle to guide the mating component during alignment.

• Compact 2.24 mm head diameter for space-constrained sheet-metal designs.

Catalog Specifications

MPP-1.5-3 has a 1.5 mm pin diameter, a +/-0.038 mm pin-diameter tolerance and a 3 mm pin length / length code. The catalog specifies a minimum sheet thickness of 0.5 mm (.020 in).

The mounting hole is 1.55 mm with a +0.025 mm allowance, equivalent to .061 in with a +.001 in allowance. Dimension D is 1.03 +/-0.1 mm (.041 +/- .004 in), and head diameter H is 2.24 +/-0.25 mm (.088 +/- .010 in).

Keep the mounting-hole center at least 2.6 mm (.102 in) from the sheet edge. The pin-end angle is 64 degrees nominal. The catalog notes that the clinching contour may vary.

The dimensional data in the catalog table are identified as hand-measured reference values. Purchasing and acceptance should follow the applicable drawing and confirmed specification.

Part Number Meaning

The MPP prefix identifies the micro positioning-pin series. The 1.5 element identifies the 1.5 mm pin diameter, and the final 3 identifies the 3 mm length code.

Use the complete part number when requesting a quotation or placing an order. Other cataloged lengths in the 1.5 mm diameter row use different complete part numbers and are not interchangeable without a design review.

Installation Guidance

Prepare a clean 1.55 mm mounting hole with the cataloged positive allowance. Maintain at least 0.5 mm sheet thickness and 2.6 mm from the hole center to the sheet edge.

Insert the pin from the punch side and apply parallel squeezing force between flat press surfaces until the head is seated against the sheet. Do not install the pin by impact.

Burrs, an oversized hole, insufficient edge distance or nonparallel pressing can reduce retention and alignment accuracy. Confirm the production setup with the selected sheet material and an approved first article before volume assembly.

Material and Finish Selection

The exact MPP-1.5-3 entry in the current LAMBOOR catalog does not assign a material grade or surface finish. These requirements should therefore be stated in the approved order specification rather than inferred from the product photograph or another supplier’s listing.

Selection should consider the sheet material, corrosion environment, electrical requirements, appearance and any post-installation coating process.

Selection and Ordering

For quotation and order review, provide the exact part number MPP-1.5-3, required quantity, sheet material and thickness, prepared-hole requirement, mating-hole or alignment details, material and finish requirements, inspection documents and packaging requirements.

LAMBOOR will review the requested configuration against the catalog dimensions and the intended assembly conditions.

Frequently Asked Questions

What does the MPP-1.5-3 part number mean?

MPP identifies the micro positioning-pin series, 1.5 identifies the 1.5 mm pin diameter, and 3 identifies the 3 mm pin length / length code.

What mounting hole and sheet thickness are required?

The catalog specifies a 1.55 mm mounting hole with a +0.025 mm allowance and a minimum sheet thickness of 0.5 mm. The hole center must be at least 2.6 mm from the sheet edge.

How is MPP-1.5-3 installed?

Place the pin in the prepared hole and use a press with flat, parallel tooling to squeeze the head into the sheet. Seat the head against the sheet without impact installation, then verify retention and alignment on the approved first article.

What is the purpose of the tapered pin end?

The nominal 64-degree lead-in end helps guide the mating component toward the pin axis during assembly. Final fit and positional accuracy still depend on the mating-hole design and the complete tolerance stack.

Are other lengths available for the 1.5 mm MPP pin?

Yes. The same 1.5 mm diameter row lists length codes 3, 4, 5, 6 and 8. Each length uses its own complete part number, so the required length must be selected explicitly.

What material and finish does MPP-1.5-3 use?

The exact catalog entry does not assign a material grade or finish. State the required material and finish in the approved order specification so they can be reviewed for the sheet material, environment and assembly process.